Portable polishing device



y 1932- Y A. PONSELLE 1,867,629

PORTABLE POLISHING DEVICE Filed June 8. 1927 2 Sheets-Sheet l ATTORNEY-S July 19, 1932. R. A. PONSELLE PORTABLE POLISHING DEVICE Filed June 8. 1927 2 Sheets-Sheet 2 ATTORNEYS Patented July '19, 1932 x r 1,867,629

UNETED .sTATE-S PATENT QIFFHQE nonnnr A. ronsnmin or ivnw vonx, 1v. I i

,POBTABLE irorrsnrne nnvion' 1 Application nee June 8', 1927. s rial no. 197,339.

This invention relates to a portable motor reduction connections sothat thetool may device in which tools of different kinds may have the desired lower rate of speed, these be mounted to be driven by the motor, so connections includingabelt which has adrivthat the device provided with appropriate ingconnection with the tool at one end theretools may be used for many purposes. For of; In the event that a rotatable shaftfis example, by mounting a suitable brush in the used, the tool may be rigidly connected to device, the latter may be used for polishing the shaft, as by means of a spline, and the floors, a long handle being first attached to shaft may carry a pulley overwhich runs a the device to afford means for moving itover belt forming part of the driving connections.

'4 the floor surface. When'the device is used l/Vhen the device is used for polishing floors, 00 for polishing furniture, buiiing silver articles a long handle is attached to it by means of a and other purposes the necessary changes are suitable handle bracket-on the frame, and the made to adapt it for those particular uses. motor leads arecarried by the handle and In general, the device may be said to comled to a switch by which the motor can be 1.; prise a light, high speed motor with a speed controlled. When the device is used for polin reduction mechanism and a tool mounting, ishing furniture, a handle of the same general the whole being constructed as a portable type maybe employed, so that the device canu it, be conveniently moved about. The motor is The object of the invention is to provide carried on a mounting which automatically if a device of this kind which is of rugged maintains thedriving connections taut, thus though inexpensive construction, light in overcoming the tendency of the belts to beweight, easily operated and arranged'so that come slack due to stretching. The motor changing of the tools and handles is a simple mounting is such that the motor can be readily operation. a removed so that it may be used to drive other For the sake of clearness, an embodiment machines, and the drivingconnections include of the invention will be illustrated and dea member driven from the shaft of the motor, scribed as it would be employed for polishbut releasable therefrom when the motor is ing'floors, though it isto be understood that removed from its mounting. This member its utility is by no means limited to that paris maintained in operative position at all m ticular use. Such an embodiment includes times by suitable means, so that after the so a frame plate-on which are mounted the momotor is removed it may readily be attached tor, speed reduction connections, and a shaft without difficulty, and when remounted the serving as a tool mounting. This shaft has :drlving connection between the motor shaft at least one free end for convenience in chang-- and this member is reestablished by the reat- 11.3 ing tools, the latter beingslipped over the taching operation.

free end of the shaft and held in place in Th'edevice includes various other features any convenient manner. This shaft is prefof novelty, which will be apparent from a erably supported in the desired position in consideration of the accompanying draw-' the frame by means of a pair of plates or ings, in which arms carried by the frame and spaced-apart Fig. 1 is a View of the machine inside a short distance. The plates'arepreferably elevation and in operative position, provided with bearings in which the shaft Fig. -2is a front view of the machine as rotates although any other suitable means shown in Fig. 1, 1 may be provided for mounting the shaft in Fig; Sis a sectional view on an enlarged the plates. scale on the line'33':of Fig. 1, with the 05 The motor is mounted on the frame at any handle andiits supporting bracket removed,

convenient point with its axis parallel to the Fig. 4 is a sectional view on the line 4-l axis of rotation of the shaft, and is of the of Fig. 8, 7 high speed type, so that it may be of light Fig. 5 and Fig. Gare sectional views on the weight. The motor drives the tool through line 5'5, of Fig. 3, the views differing i I that certain Fig. 7 is a view of a detail of the mecha nism, and r Fig. 8 is a sectional view on the line 88 of Fig. 3.

Referring now to these drawings, the machine is illustrated as consisting of a frame member or plate 10 carrying a motor 11, a tool 12, and a handle 13, the tool being illustrated in the form of a cylindrical brush and the tool motor and handle lying in alignment. The handle is mounted" detachably on the frame member by being secured by a bolt with a wing nut 14 to a bracket 15 secured to the frame plate 10 at one end thereof.

The plate 10 has a circumferential flange 16 and is provided at each side-of'one end thereof with brackets 17 in which are mounted rods 18 enclosed within sleeves. These rods project beyond the brackets in both directions and lie parallel. At one side of the bracket 17, each rod carriesa short sleeve 19 and a plate 20 is mounted on the rods at the ends of the sleeves 19. Each rod likewise carries another sleeve 21 in contact with one face of the plate 20 and mounted on the rods beyond the sleeves 21 is another plate 22 held in place by screws which enter the ends of the rods. The plates 20 and 22 are provided with ball bearing assemblies generally designated 28, the inner members 24 of the ball bearing assemblies being mounted on a shaft 25 which has a free end 26 terminating adjacent the free ends of the rods 18.

The shaft 25 is the driving shaft for the tool, here illustrated as the cylindrical brush 12, this brush having a bore through its hub to receive the shaft 25 and being provided with a slot 27 into which fits a spline 28 on the shaft. The brush is: held in position by means of a nut 29 on the free end of the shaft so that with this arrangement the brush may be slipped over the free end of the shaft and held in position thereon by means of the nut, a driving connection between the brush and shaft being established by means of the spline and slot. The brush is readily remov able over the free end of the shaft by removal of the nut 29 and this permits the brush to be readily removed when occasion arises and likewise permits the substitution of one form of tool for another, in accordance with the type of work to be performed.

Mounted on the shaft 25 between the plates 20 and 22 is a pulley 30 of any suitable construction secured to the shaft in anyconvenient manner, as by means of a set screw 31; This pulley is provided with faceplates 32 between which runs a driving belt 33 and the pulley is spaced from the ball bearing assemblies in any convenient manner.

The driving motor 11, the'casing of which is provided with a handle 34, is mounted in place on a circular plate 35 having a circumferential flange 36 within which the end of the casing fits. This plate 35 is pivotally mounted on the plate member 10 by means of a stud 37 passing through an opening in the plate member and carrying a sleeve 38 at one end, the sleeve having an opening by means of which the stud may be lubricated. The plate 85 carries bosses 39 at diametrical points in which are mounted shafts 40 which are provided with operating handles 41 and with pins 42 which enter slots 43 in the motor casing, so that when the shafts are in the position illustrated in Fig. 8, the pins enter the slots and serve to anchor the motor rigidly in position. By swinging these shafts by means of the operating handles so that the pins 42 clear the slots 43, the motor may be readily removed by its handle 34.

The motor is provided with a square shaft 44 which passes through an opening in the mounting plate and through an elongated opening 44a in the frame plate in alignment therewith. plate are thus free to swing without the shaft coming into contact with the frame plate. Secured to the rear face of the motor mounting plate on suitable bosses 45 at either side of the opening through which the shaft extends, is a plate 46 which is s aced from the face of the mounting plate an is of generallyU shape. Mounted between the legs of the U-plate 46 is a driving pulley 47 provided at one end with a circular hub 48 separated from the main part of the pulley by a circumferential channel 48a. The v plate .46 straddles the pulley 4? and its legs enter the channel. The hub 48 is of larger diameter than the distance between the legs of the plate 46 and the hub lies in the elongated slot in the main frame plate and close to the side wall thereof in such position that thepulley cannot be removed except by removal of the plate 46, once the'parts-are in assembled position; The pulley 47 has a square'bore closely fitting the shaft 44 of the motor and carries a pair of leaf springs 49 which bear against opposite faces of the shaft when the motor is mounted in position, as illustrated i in Fig. 3. v

lVith the arrangement described, it will be seen thatby swinging the shafts 40 to free the pins 42 from the slots in the motor casing,

the motor may readily be removed from the opening in they pulley 47 which has been held in position by means of the U-plate 46, the motor is then moved so that the end of its casing is in contact with the motor mounting plate and within the flange 36, and then the The motor and its mounting end of which is secured in a boss 53 on an arm 54 pivotally mounted on a stud 55 on the frame plate, the stud 52'passing through a "slot 56 in the frame plate so that the arm 54 may be swung to a limited extent. The arm is acted upon by a spring 57 which tends to swing the arm in a direction away from the taut.

motor when the latter is mounted in position on the machine, and with this arrangement the spring 57 acts to maintain the belt 50 The pulley is mounted on ball bearings conventionally illustrated at 58 on the stud 52 so that the pulley may run freely. On the smaller part of thecompound pulley 51 runs the belt 33 which also passes over the pulley 30 on the drive shaft, the belt lying close to the rods 18 but between them.

With this construction, the tension of the spring 57 tends to swing the compound pulley away from the pulley 30 so as to maintain the belt 33 taut at all times. The spring57 likewise assists in maintaining the belt 50 taut because the motor mounting plate is swung on its pivot away from the compound pulley by means-presently to be described.

The motor mounting plate is provided with a stud 59 which extends through an elongated slot 59 inthe frame plate and has attached to it a spring 60 which is secured to a fixed part of the frame; This spring tends to swing the motor mounting in a direction away from the compound pulley 51. Attached to the same stud 59 is another spring 61 connected to a pin 62 mounted eccentrically on a disc 63 on the end of one of the shafts 40, the arrangement being such that .the spring 61 tends to hold the shaft 40 with its pin 42 either in full engagement with the motor casing or entirely free therefrom. A similar spring 64 attached to the stud 59 is connected to apin 65 eccentrically mounted on a disc 66 on theother shaft 40 and this disc is provided with an eccentrically mounted lug 67 of triangular shape. Mounted on a stud 68 on the frame plate is a segment 69 having teeth along one face, this'segment being normally held against a stud 7 O on the frame plate by means of a spring 71 attached to the free end of the segment and to a convenient part of the frameplate. The-teeth of the segment are in position to contact with the triangular stud 67 as the handle 41 is moved, and when the handleis swung in a direction to free its pin from the motor casing, the stud 67 contacts with one of the teeth of the segment and upon further swinging of the handle 41, a wedging actionresults which tends to move the motor mounting plate in the direction toward the compound pulley 51. The spring 71 is much heavier considerable effort. be reattached its shaft is inserted into the than the spring6O so that the segmentonce engaged by the triangular stud, is moved to a very slight extent, while the motor mounting plate is moved to a considerable extent against-the tension of spring 60.

The movement of the handle 41 which re.-

sults in the swing of the motor plate is clearly illustrated'in Figs. 5 and'6. In Fig.5, the pins 42 are in engagement with the m0- tor casing, and the motor is securely held in position with its shaft in driving engagement with the driving pulley 47. -Upon swinging the handle 41 to the leftin Figs. 5 andi6,so

as to free its pin from the slot in the motor casing, the triangular lug 67 engages a tooth on the segment 69 as shown in Fig.6, and as the handle is moved so that its pin is free of the slot the engagement of the stud and the segment causes the motorplate to be swung to the left. belt 50 so that the removal of the motor T his releases the tension on the 7 shaft from the driving pulley requires no 1 When .the motor isto squareopening in the driving pulley and the handles'41 are then moved so that thelr pins enter the slots in the casing. This movement releases the trlangular stud 67 from the that upon removal of the motor, the pulley '4 is not released .fromthe frame plate. Itis desirable tohave the plate 46 lit loosely in the channel defining the hub 48, but a loose t would givethe pulley a considerable freedom of movement and make reinsertion of theshaft difiicult. In order to overcome this di'liiculty, one of the shafts 40' has mounted thereon an arm 72 which carries a U-shaped plate 73.0n the free end thereof. The arm has a channel 74 in'its hub in which lies a pin 7 5 on the shaft 40 and'the arrangement is such that when the shaft 40 is swung to release its pin 42 from the motor casing, its

pin 7 5 engagesthe hub of the arm 72 after the shaft has made a part of its turning movement, and further movement of the shaftca-uses the arm to-swing so that the legs of the plate 7 3 straddle the pulley. 47 and lie in the channel therein at one side of the plate 46. The plate 73 and the plate- 46 together serve to hold the pulley securely in position to be entered by the motor shaftwhen the motor is replaced. When the shaft 40 is moved to swing its pin 42 into engagement with the motor casing,-thearm 72 is return-ed tonormal position with the plate 73 free of the channel in the pulley 47 The arm 72 is connected to the shaft 40 means of the slot and pin connection in order to give some freedom of movement between the two rotat 18 is a curved plate 78 extending partly around the brush. This plate is held in place by means of studs 78 mounted in the plate 22 andcross bar, and is cut away to provide openings for the passage of belt 33. A flexible strip .79 is connected to one edge of the plate 7 8 and attached. to the free end of this flexible strip is a plate 80 which serves as a screen and normally lies in contact with the floor. The plate 80 prevents the brush from throwing dirt upwardly upon the machine when the latter is in operation, andthe strip acts as a swivel and permits the plate to contact with the floor regardless of irregularities therein, and regardless of the inclination of the device to the floor surface.

The motor is supplied with current by means of a cable 81 which leads to the motor terminals and extends upwardly along the handle 13 toa switch 82, a part of the cable (not shown) leading to any convenient outlet plug.

The driving connections are housed within a metal casing 83, the edge of which lies within the flange 16 on the frame plate, one end of the casing passing beneath a rearward extension on the plate 22 and bearing-against the rods 18. Posts 841 extending outwardly from the frame plate support the casing and the latter is connected thereto by means of screws. It will be seen that the machine is of simple construction and of compact arrangement, it is easily operated and when used to polish floors, the entire weight of the machine may rest on the tool so that the latter is highly effective. The motor which is of the high speed type drives the tool at a reduced'speed by means of the connections illustrated and these connections are arranged so that the belts are kept taut at all times. The belts ordinarily used in machines of this type are subject to being stretched after a period of service, but in the present device any slackness in the belts is automatically taken up by the swinging of the motor mounting plate and of the arm 54 on which the intermediate compound pulley is mounted. As the spring 57 is much heavier'than any. of the other springs on the machine, the motor mounting plate will be drawn away from the brush as the drive belt 33 becomes stretched, and for that reason, the segment 69 is provided with a series of teeth so that regardless of the position'of the motor mounting plate, the triangular lug 67 will. be in a position to engage a tooth on the segment when the shaft 410 is swung to. permit the motor to be removed from the machine.

Since the machine is of relatively light weight and the handle can readily be removed, the machine may be used for many purposes besides cleaning floors.

Iclaim: v

1. In a device of the type described, the combination of a frame, a rotarytool mounted thereon, a motor mounting on said frame, a motor adapted to be positioned in the mounting, means for removably securing the motor in the mounting so as to permit the complete removal of the motor therefrom and an indirect connection between the motor shaft and the tool including a member receiving the motor shaft to be driven thereby, and a support forholding the member substantially in operative position when the motor is removed from the mounting, whereby the replacement of'the motor re-establishes the driving connection.

2.The combination .of a frame, a rotary tool mounted in the frame, a motor mounting pivotally attached to the frame at one side of the tool and adapted to. swing, a motor on said mounting, a. shaft mounted in a pivoted support'on the frame and carrying pulleys, the shaft mounting being'arranged to swing, driving connections between the motor and one of said pulleys, and between the other pulley and the tool, and means tendingto force the motor and shaft away from each other.

3. The combination ofv a frame, a tool mounted on the frame for rotation ,and adapted to contactwith a surface to be operated on, a motor'mounting movably attached to the frame, a motor detachably mounted on said mounting, a flexible driving connection between the motor and the tool, the mounting being provided with means tending to move the mounting to maintain the driving connection taut, and means for securing the motor to its mounting.

l. The .combination of a frame, a motor pivotally and detachably mounted on Said frame, a rotary tool mounted on the frame for rotation in contact with the surface to be operated on, a flexible driving connection between the motor. and the tool, means for i swinging the motor to maintain the driving connection taut, and means for locking the motor on its mounting, the said locking means being connected to the said means for swinging the motor to controlfthe operation thereof. 1255 5. The combination of a frame, a rotary tool mounted in the frame for rotation in contact with the surface to, be operated on, a

when the motor is in attached position, a driving connection between the pulley and the tool, and means for supporting the pulcombination of a frame, a rotary tool car ried by the frame and adapted to rotate in contact with the surface to be operated upon, a motor mounting on the frame, a motor having a shaft, a second mounting on said frame, a pulley loosely supported by said second mounting, said pulley having a non-cylindrical opening therein adapted to receive a non-cylindrical extension on said motor shaft and to be supported thereby free of its mounting, a driving connection between the pulley and the tool, means for detachably securing the motor in its mounting, and means on the frame movable into engagement with the pulley to hold it against movement as the motor shaft is moved into and out of the pulley. Q

7. In a device of the type described, the combination of a frame, a tool thereon are ranged for rotation in contact with the surface to be operated on, a plate pivotally mounted on the frame, a motor arranged for 2;: attachment to the plate, a flexible driving connection between themotor and the tool, means for swinging the plate to maintain the driving connection taut, means for holding the motoron its mounting, and means operableby the release of said holding means for swinging the mounting plate to slacken the sald driving connection.

8. In a device of the type describechthe combination of a frame, a tool mounted on I i the frame for rotation, a plate movably mounted on the frame,'a"1notor detachably mounted on the plate, means acting on the plate and tending to force it toward the tool,

a shaft carrying a compound pulley, a mount-l ing for the shaft movably mounted on the frame, a belt leading from the motor shaft to the compound pulley and a second belt leading from the compound pulley to the tool, means acting on theshaft mounting to force the shaft away from the tool to maintain the belts taut, locking means for holding the motor on its mounting plate, and means operated by said locking means, when the latter is released, to move the motor mounting plate toward the shaft to slacken the belt between the motor and the compound pulley.

9. In a device of the type described, the combination of a frame, a tool mounted on the frame for rotation, a plate movably mounted on the frame, a motor detachably mounted on the plate, means acting on the plate and tending to force it toward the tool,

a shaft carrying a compound pulley, a movable mounting on the plate for the shaft, a

belt leading from the motor shaft to the compound pulley, and a second belt leadingfrom the compoundpulley to the tool, means acting on the shaft mounting to force the shaft away from the tool to maintainthe belts taut, lockin means for holding the motor on its mounting plate, and-means operative by the locking means when the latter is released to move the said plate to slacken the belt betweenthe motor and the compound pulley,

said moving means including a toothed seg-v ment attached to'the frame and a stud attached'to the motor'mounting plate and engageable with the teeth of the segment.

10. The combinationof a frame, a motor mounted on'th-e frame, a rotary element adapted to ,receive the motor shaft tobe driven 7 thereby, andsupported thereon, and

means on the-frame-independent of the shaft mounted. on the frame, a rotary element car- I riedloosely onthe frame'and adapted to be driven by tl1e motor shaft, means attached to the frame for holding -.the motor in position thereon, means on the frame for engaging and positioning the rotary element in proper operative relation'to'the shaft lengthwise of the latter, and means when the motor V isdisconnected formaintaining the element in positionto. receive the shaft} r 12. ,In a machine of the type described, the combination of a frame, a-motor removably mounted on the frame, a rotary element on the frame having a non-cylindrical opening therein into which the motor shaft is insertable by a sliding motion, the shaft'being formed to fit said opening so that the insertion of the shaft establishes a driving connection between it and the element, and a member on the frame independent of the shaft and movable into engagement with the element for positioning the latter in proper operative relation to the shaft.

13. In a device of the type described, the

combination of a frame, arotary element carried by the frame, a motor adapted to be mounted detachably on the frameand having a shaft receivable in said element to drive the latter, releasable means for securing the no i motor to the frame, and means operable by 1 said securing means for positioning the element in operative position relative to the shaft lengthwise of the latter when the shaft is introduced into the element.

14:. In a device of the type described, th combination' of a frame, a rotary element ,2;

carried by the frame, a motor adapted to be mounted detachably on the frame and having a shaft receivable in' said element to drive the latter, releasable means forsecuringthe motor to the frame, and amovable memberv il' operative to engage the element and hold it against movement When the shaft is being introduced into and Withdrawn therefrom.

15. In adevice of-the type described, the combination of a frame, a rotary element,

7 a motor adapted to bemounted-detachably on the frame, and having a shaft receivable in said element to support and drive the latter,

releasable means for securing the motor to i the frame, and a member on'the frame movable to engage the element and hold it against movement with the shaft as the latter is inserted into and Withdrawn from the element.

16. In a floor treating machine, a casing,

a motor removably mounted onsaid casing so that the end of the shaft thereofextends Within the casing, said end being non-cylin drical in form, a rotatable element Within the casing having a non-cylindrical opening therein to receive said shaft, and spring clip means on said rotatable element engaging said shaft when its motor ismounted on the 17. In a floor treating machine, a casing, ainotor removably mounted on said casing so that the end of the shaft thereof extends Within the casing, said end being non-cylindrical in form, a rotatable element Within the casing having a non-cylindrical opening therein to receive said shaft, and'resilient clamping means on said element operated by mounting the motor on the casing to clamp said element in position onsaid shaft. I

In testimony whereof I affix my signature.

ROBERT A. VPONSELLE.

casing to hold said element in position there- 

